Checking And Clearing Diagnostic; Check Engine" Lamp Check; Output Of Diagnostic Code S - Toyota COMPUTER-CONTROLLED SYSTEM Training Manual

CHECKING AND CLEARING DIAGNOSTIC CODES
®
CHECKING AND CLEARING DIAGNOSTIC CODE S
OBJECTIVE :
To learn how to check and clear diagnostic codes .
PREPARATION :
SST 09843-18020 Diagnosis check wire
APPLICABLE ENGINE : 4A-FE ( Sep ., 1989 )
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This section basically covers the 4A-FE engine . However, since the TDCL and test mode function in
the diagnosis system are not provided in the 4A-FE engine, the procedures and illustrations related to
these items are explained using the 1 UZ-FE (Dec ., 1989) engine .
C~3
CHEC K
ENGIN E
CHECK
Check connecto r
SST
or TE1
El
0
TDC L
1 L
SST
El
TE1
"CHECK
ENGINE"
LAMP CHEC K
(a) The "CHECK ENGINE" lamp should come on when
the ignition switch is turned on (engine not
running) .
(b) When the engine is started, the "CHECK ENGINE"
lamp should go off . If the light remains on, it
indicates that the diagnostic system has detected
a malfunction or abnormality in the diagnostic
system .
OUTPUT OF DIAGNOSTIC CODE S
1 . NORMAL MOD E
To output the diagnostic codes, proceed as follows :
(a) Initial conditions :
• Battery voltage at 11 V or higher
• Transmission in "N" rang e
• Ail accessories switched off
(b) Turn the ignition switch on .
(c) Using the SST, connect terminal T or TE1 with
terminal El of the check connector or the TDCL .
SST 09843-18020
159